Three-unit butterfly-shaped leading-in optical cable

Abstract

The invention belongs to the technical field of optical cables, and discloses a three-unit butterfly-shaped leading-in optical cable which is provided with two identical first butterfly-shaped units, a second butterfly-shaped unit and an outer sheath, the cross section of each first butterfly-shaped unit is in a convex shape, the cross section of each second butterfly-shaped unit is in an I shape, two grooves are formed between the I-shaped parallel protective sleeves, and the two grooves are communicated with the outer sheath. The protruding parts of the two first butterfly-shaped units are embedded into the grooves of the second butterfly-shaped unit respectively, the two first butterfly-shaped units and the second butterfly-shaped unit form a cable core with the overall rectangular cross section, the cable core is wrapped with the outer sheath, and the cross section of the outer sheath is rectangular. The invention has the main beneficial technical effects of simple, ingenious and compact structure, easiness in manufacturing, capability of being used by multiple households at the same time, and simultaneous photoelectric transmission.

Description

Technical Field

[0001] The invention belongs to the technical field of optical cables, and in particular relates to a three-unit butterfly-shaped introduction optical cable. Background Art

[0002] Butterfly-type drop optical cables are widely used in FTTX, which are equivalent to capillaries in optical signal transmission, connecting each end user. At the same time, optical-electrical simultaneous transmission is also proposed as a new demand for butterfly-type drop optical cable access.

[0003] The existing technology for multi-core butterfly-shaped optical cable introduction mainly includes: CN116577893A discloses a multi-unit structure butterfly-shaped introduction optical cable, which has a protective layer and at least three butterfly-shaped units, wherein the butterfly-shaped unit is composed of an optical fiber, two butterfly-shaped unit reinforcement members and a butterfly-shaped unit protective layer, wherein the cross-section of the butterfly-shaped unit protective layer is dumbbell-shaped, and all the butterfly-shaped units are located in the same protective layer, and the protective layer is composed of butterfly-shaped unit containing bodies whose number is the same as the number of the butterfly units, and a central reinforcement member cavity is surrounded by all the butterfly-shaped unit containing bodies, and a central reinforcement member cavity is fixedly provided in the central reinforcement member cavity; the circular shape is not suitable for the arrangement of square tubes, and the space waste in the square tubes is large, and most of the existing corridors use square tubes.

[0004] CN115097588A discloses a multi-unit butterfly-shaped optical cable, which has a plurality of butterfly-shaped units and a plurality of snap-fit ​​components; the unit sheath of the butterfly-shaped unit has a first fitting opening and a second fitting opening; the snap-fit ​​component is composed of a snap-fit ​​body; in the assembled state, the outer edges of all the butterfly-shaped units are on the same cylindrical surface, one end of the snap-fit ​​component between adjacent butterfly-shaped units is embedded in the second fitting opening of one butterfly-shaped unit, and the other end of the snap-fit ​​component between adjacent butterfly-shaped units is embedded in the first fitting opening of another butterfly-shaped unit. It also has the above-mentioned defects.

[0005] CN209373203U discloses a multi-unit butterfly-shaped optical cable, comprising at least two optical fiber units, the optical fiber units are covered with an outer sheath, the optical fiber units are arranged in parallel along the long axis direction of the outer sheath, a reinforcing member is arranged between any two optical fiber units, the reinforcing member is arranged on the center line of the two optical fiber units, the reinforcing member is arranged in parallel with the optical fiber units, and a tear is arranged on the outer sheath on both sides of each optical fiber unit along the short axis direction of the outer sheath. It is not suitable for use in multi-unit occasions of square pipes.

[0006] In addition, the self-supporting butterfly cable in the prior art is composed of a butterfly unit, connecting ribs, and additional reinforcement units. The connecting ribs and additional reinforcement units are connected in the long direction of the cross section of the butterfly unit, so the product height is too high and the connecting ribs are easy to break. Summary of the invention

[0007] To solve the above problems, the purpose of the present invention is to disclose a three-unit butterfly-shaped optical cable introduction cable, which is implemented by adopting the following technical solutions.

[0008] A three-unit butterfly-shaped optical cable is provided with two identical first butterfly-shaped units, one second butterfly-shaped unit, and an outer sheath. The cross section of the first butterfly-shaped unit is a convex-shaped unit, the cross section of the second butterfly-shaped unit is an I-shaped unit, two grooves are formed between the parallel I-shaped protective sheaths, the protruding parts of the two first butterfly-shaped units are respectively embedded in the grooves of the second butterfly-shaped units, the two first butterfly-shaped units and the second butterfly-shaped unit constitute a cable core with a rectangular cross section as a whole, the outer sheath is covered on the outside of the cable core, and the cross section of the outer sheath is a rectangle.

[0009] A three-unit butterfly-shaped optical cable is provided, comprising two identical first butterfly-shaped units, a second butterfly-shaped unit and an outer sheath, wherein the first butterfly-shaped unit is composed of a first communication component, a first reinforcement member, a first sheath, a second reinforcement member and a second sheath, wherein the first reinforcement member is located on the left and right sides of the first communication component, the first sheath covers the first communication component and the first reinforcement member, the cross section of the first sheath is rectangular, and on the cross section of the first sheath, the first communication component and the first reinforcement member are distributed along the length direction of the first sheath, the second sheath covers the second reinforcement member, the second sheath is located directly below the first sheath and is integrated with the second sheath; the second butterfly-shaped unit is composed of a first protective sheath, a second protective sheath, a third protective sheath, a first reinforcement member, a second reinforcement member and a second communication component, the third protective sheath is located between the first protective sheath and the second protective sheath, the first protective sheath is parallel and equal to the second protective sheath, and the third protective sheath is vertical The first protective cover is bisected, the first protective cover, the second protective cover and the third protective cover are integrated into one body, the first reinforcement piece is located in the first protective cover, the second reinforcement piece is located in the second protective cover, the second communication component is located in the third protective cover, the second communication component is composed of a second adhesive layer and a plurality of optical fibers, the plurality of optical fibers are arranged in a row and adjacent optical fibers do not contact each other, the second adhesive layer covers all the optical fibers as a whole, a first groove is formed between the upper surfaces of the first protective cover, the third protective cover and the second protective cover, and a second groove is formed between the lower surfaces of the first protective cover, the third protective cover and the second protective cover; the three-unit butterfly is introduced into the optical cable, the second cover of the first first butterfly unit is embedded in the first groove, the second cover of the second first butterfly unit is embedded in the second groove, and the outer cover covers the two first butterfly units and the second butterfly unit as a whole.

[0010] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the second reinforcement member is composed of an insulating layer and a conductor, and the insulating layer covers the conductor.

[0011] In the above-mentioned three-unit butterfly-shaped optical cable, the first reinforcement member is composed of a first insulating sleeve and a first conductor, and the first conductor is located in the first insulating sleeve; the second reinforcement member is composed of a second insulating sleeve and a second conductor, and the second conductor is located in the second insulating sleeve.

[0012] The present application has the following major beneficial technical effects: simple, ingenious, compact structure, easy to manufacture, can be used by multiple households at the same time, and photoelectric simultaneous transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure after dissection of Example 1.

[0014] Figure 2 for Figure 1 Schematic diagram of the enlarged cross-section structure.

[0015] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of a dissected segment of the first butterfly unit used in .

[0016] Figure 4 for Figure 3 Schematic diagram of the enlarged cross-section structure.

[0017] Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of a dissected segment of the second butterfly unit used in .

[0018] Figure 6 for Figure 5 Schematic diagram of the enlarged cross-section structure.

[0019] Figure 7 Schematic diagram of the three-dimensional structure of a section of the first butterfly unit used in Example 2 after dissection.

[0020] Figure 8 Schematic diagram of the cross-sectional structure of the first butterfly unit used in implementation example 3.

[0021] Fig. 9 Schematic diagram of the cross-sectional structure of the second butterfly unit used in implementation example 4. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand and implement this patent, the marks in the drawings are now described in detail in conjunction with the drawings in the specification.

[0023] In the figure: 1-first butterfly unit, 2-second butterfly unit, 3-outer sheath, 11-first communication component, 12-first reinforcement, 13-first sheath, 14-first tear, 15-second reinforcement, 16-second sheath, 17-second tear, 21-first protective cover, 22-second protective cover, 23-third protective cover, 24-first reinforcement, 25-second reinforcement, 26-second communication component, 111-first bonding layer, 112-optical fiber, 151-insulating layer, 152-conductor, 201-first groove, 202-second groove, 241-first insulating cover, 242-first conductor, 251-second insulating cover, 252-second conductor, 231-third tear, 261-second bonding layer, 262-optical fiber.

[0024] Implementation Example 1: Please see Figures 1 to 6 A three-unit butterfly-shaped optical cable includes two identical first butterfly-shaped units 1, a second butterfly-shaped unit 2, and an outer sheath 3. The first butterfly unit 1 is composed of a first communication component 11, a first reinforcement 12, a first sheath 13, a second reinforcement 15, and a second sheath 16. The first reinforcement 12 is located on the left and right sides of the first communication component 11. The first sheath 13 covers the first communication component 11 and the first reinforcement 12. The cross section of the first sheath 13 is rectangular. On the cross section of the first sheath 13, the first communication component 11 and the first reinforcement 12 are distributed along the length direction of the first sheath 13. The second sheath 16 covers the second reinforcement 15. The second sheath 16 is located directly below the first sheath 13 and is integrated with the second sheath 16. The second butterfly unit 2 is composed of a first protective cover 21, a second protective cover 22, a third protective cover 23, a first reinforcement 24, a second reinforcement 25, and a second communication component 26. The third protective cover 23 is located between the first protective cover 21 and the second protective cover 22. The first protective cover 21 is parallel and equal to the second protective cover 22. The third protective cover 23 vertically divides the first protective cover 21 in half. The first protective cover 21, the second protective cover 22, and the third protective cover 23 are combined into one. The first reinforcement 24 is located in the first protective cover 21, and the second reinforcement 25 is located in the second protective cover 2 2, the second communication component 26 is located in the third protective cover 23, the second communication component 26 is composed of a second adhesive layer 261 and a plurality of optical fibers 262, the plurality of optical fibers 262 are arranged in a row and adjacent optical fibers 262 do not contact each other, the second adhesive layer 261 covers all the optical fibers 262 as a whole, a first groove 201 is formed between the first protective cover 21, the upper surface of the third protective cover 23 and the second protective cover 22, and a second groove 202 is formed between the first protective cover 21, the lower surface of the third protective cover 23 and the second protective cover 22; In the three-unit butterfly-shaped optical cable, the second sheath 16 of the first first butterfly-shaped unit 1 is embedded in the first groove 201, and the second sheath 16 of the second first butterfly-shaped unit 1 is embedded in the second groove 202. The outer sheath 3 covers the two first butterfly-shaped units 1 and the second butterfly-shaped unit 2 as a whole.

[0025] In the above-mentioned three-unit butterfly-shaped optical cable introduction, a first tearing opening 14 is provided on the surface of the first sheath 13 on the upper side of the first communication component 11 .

[0026] Furthermore, in the above-mentioned three-unit butterfly-shaped optical cable introduction, a second tearing opening 17 is provided at the connection between the second sheath 16 and the first sheath 13 .

[0027] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the surface of the third protective cover 23 has a third tearing opening 231 .

[0028] In the above-mentioned three-unit butterfly-shaped optical cable, the first communication component 11 is an optical conductor, which is an optical fiber. The model of the optical fiber is G.652, G.655, G.656, G.657, A1a, A1b, or A1c.

[0029] In the above-mentioned three-unit butterfly-shaped optical cable, the material of the outer sheath 3 is plastic.

[0030] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the first reinforcement member 12 is a steel wire, an aluminum wire, an iron wire, a copper wire, a lead wire, a glass fiber reinforced plastic rod, an aramid yarn, or a glass fiber yarn bundle.

[0031] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the material of the first sheath 13 is plastic.

[0032] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the second reinforcement member 15 is a steel wire, an aluminum wire, an iron wire, a copper wire, a lead wire, a glass fiber reinforced plastic rod, an aramid yarn, or a glass fiber yarn bundle.

[0033] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the material of the second sheath 16 is plastic.

[0034] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the outer sheath 3 has a length of 2.8-3.2 mm and a width of 1.8-2.2 mm; or, the outer sheath 3 has a length of 2.2-1.8 mm and a width of 1.4-1.6 mm.

[0035] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the material of the first protective cover 21 is plastic.

[0036] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the first reinforcement member 24 is a steel wire, an aluminum wire, an iron wire, a copper wire, a lead wire, a glass fiber reinforced plastic rod, an aramid yarn, or a glass fiber yarn bundle.

[0037] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the second reinforcement member 25 is a steel wire, an aluminum wire, an iron wire, a copper wire, a lead wire, a glass fiber reinforced plastic rod, an aramid yarn, or a glass fiber yarn bundle.

[0038] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the material of the second adhesive layer 261 is plastic.

[0039] In the above-mentioned three-unit butterfly-shaped optical cable, the model of the optical fiber 262 is G.652, G.655, G.656, G.657, A1a, A1b or A1c.

[0040] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the first reinforcement member 24 and the second reinforcement member 25 both have a rectangular cross section.

[0041] Implementation Example 2: Please see Figure 7 , and refer to Figures 1 to 6 , a three-unit butterfly-shaped optical cable introduction, which is basically the same as the implementation example 1, except that: the second reinforcement member 15 is composed of an insulating layer 151 and a conductor 152, and the insulating layer 151 covers the conductor 152.

[0042] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the material of the insulating layer 151 is plastic.

[0043] In the above-mentioned three-unit butterfly-shaped optical cable, the material of the conductor 152 is copper or aluminum or copper alloy or aluminum alloy.

[0044] Implementation Example 3: Please see Figure 8 , and refer to Figures 1 to 7 A three-unit butterfly-shaped optical cable introduction is basically the same as implementation example 1, except that: the first communication component 11 is composed of a first adhesive layer 111 and multiple optical fibers 112, the first adhesive layer 111 integrally covers all the optical fibers 112, the optical fibers are arranged in rows, and adjacent optical fibers do not contact each other, and the first communication component 11 is an optical fiber ribbon; in the cross section, the length direction of the first adhesive layer 111 is parallel to the short side of the first sheath 13, and the first tear 14 is located directly above the wide side of the first adhesive layer 111.

[0045] Of course, the first communication component 11 can also be arranged in the first sheath 13 by being rotated 90 degrees.

[0046] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the material of the first bonding layer 111 is plastic, preferably polyacrylic resin.

[0047] In the above-mentioned three-unit butterfly-shaped optical cable, the type of the optical fiber 112 is G.652, G.655, G.656, G.657, A1a, A1b or A1c.

[0048] Implementation Example 4: Please see Fig. 9 , and refer to Figures 1 to 8 , a three-unit butterfly-shaped optical cable introduction cable, which is basically the same as implementation example 1, except that: the first reinforcement member 24 is composed of a first insulating sleeve 241 and a first conductor 242, and the first conductor 242 is located in the first insulating sleeve 241; the second reinforcement member 25 is composed of a second insulating sleeve 251 and a second conductor 252, and the second conductor 252 is located in the second insulating sleeve 251.

[0049] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the material of the first insulating sleeve 241 is plastic.

[0050] In the above-mentioned three-unit butterfly-shaped optical cable, the material of the first conductor 242 is copper or aluminum or copper alloy or aluminum alloy.

[0051] In the above-mentioned three-unit butterfly-shaped optical cable introduction, the material of the second insulating sleeve 251 is plastic.

[0052] In the above-mentioned three-unit butterfly-shaped optical cable, the material of the second conductor 252 is copper or aluminum or copper alloy or aluminum alloy.

[0053] In the present application, the second reinforcement member 15 in implementation example 2 can be used in any other implementation example, the first communication component 11 in implementation example 3 can be used in any other implementation example, and the first reinforcement member 24 and the second reinforcement member 25 in implementation example 4 can also be used in any other implementation example.

[0054] In the present application, the cross-section of the first butterfly-shaped unit 1 is in a convex shape, and the cross-section of the second butterfly-shaped unit 2 is in an I-shape. The two first butterfly-shaped units 1 and the one second butterfly-shaped unit 2 are cleverly combined to form an overall rectangular cross-sectional structure, which fully utilizes space resources and forms an outer sheath 3 with a rectangular cross-section.

[0055] Compared with the self-supporting butterfly-shaped optical cable in the prior art, the butterfly-shaped optical cable in the present application saves space by lateral arrangement of the first sheath 13 and cooperation with the second sheath 16; the self-supporting butterfly-shaped optical cable in the prior art arranges the second sheath at one end of the length direction of the first sheath, and there is a connecting rib between the two, so the present application saves length space and can still achieve the effect of self-supporting laying after stripping the outer sheath 3.

[0056] In the present application, when the second reinforcement member 15 has a conductor 152, it can be used as a transmission line. The conductors 152 of the two first butterfly units 1 constitute a group of transmission lines. When connected to a floor, it can be conveniently connected to the public power box of the opposite residents or the residents of the adjacent three units, and the first butterfly unit 1 and the second butterfly unit 2 are connected to the households respectively, achieving the purpose of fiber-to-the-home.

[0057] In the present application, when the first conductor 242 and the second conductor 252 are provided, the second butterfly unit 2 can be powered separately.

[0058] In the present application, the height of the first protective cover 21 and the second protective cover 22 matches the width of the first protective cover 13 , and the distance between the outer edge of the first protective cover 21 and the outer edge of the second protective cover 22 , that is, the distance between the uppermost surface and the lowermost surface of the I-shape, matches the length of the first protective cover 13 .

[0059] In the present application, it is not limited to the structure of two first butterfly-shaped units 1 and one second butterfly-shaped unit 2, but can also be a structure of a first butterfly-shaped unit 1 and a second butterfly-shaped unit 2. In this way, the protruding portion of the first butterfly-shaped unit 1 is just embedded in a groove of the second butterfly-shaped unit 2, which also achieves the purpose of a rectangular cross-section, but only wastes the space of a groove.

[0060] Furthermore, in the present application, it is not limited to the above structure, but can also be a structure of multiple groups of two first butterfly-shaped units 1 and one second butterfly-shaped unit 2, so that they are horizontally spliced ​​and covered with an outer sheath on the outside; similarly, it can also be a structure of one first butterfly-shaped unit 1 and one second butterfly-shaped unit 2, so that they are horizontally spliced ​​and covered with an outer sheath on the outside; in this way, the expansion of a larger number of cores and more units is achieved.

[0061] In the present application, it may be referred to as a multi-unit butterfly-shaped drop optical cable, or a multi-group unit butterfly-shaped drop optical cable.

[0062] Furthermore, in the present application, the second butterfly unit 2 may not exist, but only the protruding parts of the two first butterfly units 1 are opposed to each other, so that two transmission wires with rectangular cross-sections are placed in the empty grooves formed by the two side edges of the protruding parts, and the transmission wires are composed of a conductive tape and an insulating outer layer outside the conductive tape. In this way, a cable core with a rectangular cross-section is formed, and an outer sheath is covered on the outside to form an optical cable; the transmission wires are just isolated by the protruding parts, which improves the insulation and electrical safety performance, and can carry higher currents and transmit higher power electrical energy; the cable core in this form can be expanded up, down, left and right to achieve the expansion of more units and the expansion of electrical energy, and the protruding part refers to the second sheath 16.

[0063] In the present application, the engagement of the second sheath 16 with the first groove 201 and the second groove 202 improves the integrity of the optical cable and improves its torsion resistance and bending resistance. In the present application, the first tearing opening 14 is used to tear open the first sheath 13 and conveniently remove the first communication component 11, and the second tearing opening 17 is used to tear open the second sheath 16 and facilitate the insertion of the first sheath 13 into the optical fiber connector; the third tearing opening 231 is used to tear open the third protective sheath 23 and conveniently remove the second communication component 26.

[0064] The first butterfly unit 1 and the second butterfly unit 2 in the present application can be matched with the optical fiber connector in the prior art without the need for additional design.

[0065] The present application has the following major beneficial technical effects: simple, ingenious, compact structure, easy to manufacture, can be used by multiple households at the same time, and photoelectric simultaneous transmission.

[0066] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A three-unit butterfly-shaped optical cable, comprising two identical first butterfly-shaped units, a second butterfly-shaped unit, and an outer sheath, characterized in that: The cross section of the first butterfly-shaped unit is a convex-shaped one, and the cross section of the second butterfly-shaped unit is an I-shaped one. Two grooves are formed between the parallel protective sleeves of the I-shaped ones. The protruding parts of the two first butterfly-shaped units are respectively embedded in the grooves of the second butterfly-shaped units. The two first butterfly-shaped units and the second butterfly-shaped units constitute a cable core with a rectangular cross section as a whole. The outer sheath is covered on the outside of the cable core, and the cross section of the outer sheath is a rectangle.

2. A three-unit butterfly-shaped optical cable, comprising two identical first butterfly-shaped units (1), a second butterfly-shaped unit (2), and an outer sheath (3), characterized in that: The first butterfly unit (1) is composed of a first communication component (11), a first reinforcement member (12), a first sheath (13), a second reinforcement member (15), and a second sheath (16); the first reinforcement member (12) is located on the left and right sides of the first communication component (11); the first sheath (13) covers the first communication component (11) and the first reinforcement member (12); the cross section of the first sheath (13) is rectangular; on the cross section of the first sheath (13), the first communication component (11) and the first reinforcement member (12) are distributed along the length direction of the first sheath (13); the second sheath (16) covers the second reinforcement member (15); the second sheath (16) is located directly below the first sheath (13) and is integrated with the second sheath (16); The second butterfly-shaped unit (2) is composed of a first protective cover (21), a second protective cover (22), a third protective cover (23), a first reinforcement member (24), a second reinforcement member (25), and a second communication component (26); the third protective cover (23) is located between the first protective cover (21) and the second protective cover (22); the first protective cover (21) and the second protective cover (22) are parallel and equal; the third protective cover (23) vertically divides the first protective cover (21) in half; the first protective cover (21), the second protective cover (22), and the third protective cover (23) are combined into one; the first reinforcement member (24) is located inside the first protective cover (21); the second reinforcement member (25) is located inside the second protective cover (21); The second communication component (26) is located in the third protective sleeve (23), the second communication component (26) is composed of a second adhesive layer (261) and a plurality of optical fibers (262), the plurality of optical fibers (262) are arranged in a row and adjacent optical fibers (262) do not contact each other, the second adhesive layer (261) covers all the optical fibers (262) as a whole, a first groove (201) is formed between the first protective sleeve (21), the upper surface of the third protective sleeve (23) and the second protective sleeve (22), and a second groove (202) is formed between the first protective sleeve (21), the lower surface of the third protective sleeve (23) and the second protective sleeve (22); In the three-unit butterfly-shaped lead-in optical cable, the second sheath (16) of the first first butterfly-shaped unit (1) is embedded in the first groove (201), the second sheath (16) of the second first butterfly-shaped unit (1) is embedded in the second groove (202), and the outer sheath (3) entirely covers the two first butterfly-shaped units (1) and the second butterfly-shaped unit (2).

3. A three-unit butterfly-shaped drop optical cable according to claim 2, characterized in that: A first tearing opening (14) is provided on the surface of the first sheath (13) on the upper side of the first communication component (11).

4. A three-unit butterfly-shaped drop optical cable according to claim 3, characterized in that: A second tearing opening (17) is provided at the connection between the second sheath (16) and the first sheath (13).

5. A three-unit butterfly-shaped drop optical cable according to claim 4, characterized in that: A third tearing opening (231) is provided on the surface of the third protective cover (23).

6. A three-unit butterfly-shaped drop optical cable according to claim 5, characterized in that: The length of the outer sheath (3) is 2.8-3.2 mm, and the width is 1.8-2.2 mm; or, the length of the outer sheath 3 is 2.2-1.8 mm, and the width is 1.4-1.6 mm.

7. A three-unit butterfly-shaped drop optical cable according to claim 6, characterized in that: The second reinforcement member (15) is composed of an insulating layer (151) and a conductor (152), and the insulating layer (151) covers the conductor (152).

8. A three-unit butterfly-shaped drop optical cable according to claim 7, characterized in that: The first reinforcement member (24) is composed of a first insulating sleeve (241) and a first conductor (242), and the first conductor (242) is located in the first insulating sleeve (241); the second reinforcement member (25) is composed of a second insulating sleeve (251) and a second conductor (252), and the second conductor (252) is located in the second insulating sleeve (251).

9. A three-unit butterfly-shaped drop optical cable according to claim 8, characterized in that: The material of the first insulating sleeve (241) is plastic, the material of the first conductor (242) is copper or aluminum or a copper alloy or an aluminum alloy, the material of the second insulating sleeve (251) is plastic, and the material of the second conductor (252) is copper or aluminum or a copper alloy or an aluminum alloy.

10. A three-unit butterfly-shaped drop optical cable according to any one of claims 1 to 9, characterized in that: The material of the outer sheath is plastic.

Images